A method for obtaining thickness distribution of asymmetrical rolling gap exit of four-high rolling mill

Abstract

The invention discloses a method for obtaining the thickness distribution of the asymmetrical rolling gap of a four-high rolling mill. The method includes the following steps: obtaining roll system parameters, process parameters and setting parameters; Number of discrete sections of upper work roll, lower work roll, upper back-up roll, lower back-up roll and rolling stock, the abscissa of the middle of each discrete section and the width of each discrete section; the upper work roll, lower work roll, upper back-up roll and lower support are calculated The elastic bending effect function of the roll; assume that the thickness distribution of the roll gap exit is the thickness distribution of the no-load roll gap; calculate and obtain the lateral distribution of the rolling pressure and the related parameters of the total rolling pressure and the elastic deformation of the upper and lower rolls; obtain the asymmetric rolling conditions The thickness distribution of the roll gap exit; judge whether the roll gap exit thickness distribution has converged. The beneficial effects of the present invention are: the principle of the method of the present invention is clear and clear, the simplified conditions are few, compared with the traditional analytical method, the elastic deformation behavior of the roll system can be simulated more accurately, and the calculation accuracy is higher.

Description

technical field [0001] The invention belongs to the technical field of rolling, and in particular relates to a method for obtaining the thickness distribution of the asymmetrical rolling gap exit of a four-high rolling mill. Background technique [0002] In the process of strip rolling, the thickness distribution at the exit of the rolled piece is directly determined by the thickness distribution at the exit of the loaded roll gap. Therefore, calculating the thickness distribution at the exit of the roll gap during the rolling process is one of the important contents in the calculation of the shape setting of the rolled piece. The basis of rolling stock shape control, the high-efficiency and high-precision roll gap outlet thickness distribution calculation method is of great significance for improving the rolling stock shape control accuracy. [0003] The existing methods for calculating the thickness distribution of the roll gap outlet are to simplify the rolling mill roll ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for obtaining the thickness distribution of the asymmetric rolling roll gap outlet of a four-high rolling mill in view of the deficiencies in the prior art, so as to solve the problem of the existing calculation method not considering the asymmetrical factors. The influence of the distribution leads to the problem that the calculation results do not match the actual situation on site

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